Add single-row cut generator

onerow/benchmark/out/mik-250-1-100-1.yaml

@@ -0,0 +1,55 @@
+input_file:
+  instances/mik-250-1-100-1.pre.mps.gz
+sol_value:
+  0: -79842.423635
+  1: -72824.000000
+  2: -70219.174256
+sol_status:
+  0: optimal
+  1: optimal
+  2: optimal
+n_added_cuts:
+  total:
+    1055
+  depth:
+    0: 100
+    1: 110
+    2: 306
+    3: 294
+    4: 157
+    5: 65
+    6: 20
+    7: 2
+    8: 1
+n_generated_cuts:
+  total:
+    30321
+  round:
+    1: 100
+    2: 30221
+  depth:
+    0: 5197
+    1: 5082
+    2: 5042
+    3: 4686
+    4: 4146
+    5: 3132
+    6: 1897
+    7: 826
+    8: 256
+    9: 48
+    10: 8
+    11: 1
+trivial_lifting:
+  max_m: 1405
+  average_m: 45.731028
+  integral_coefficients: 0.944252
+  slowdown: 43.181598
+timers:
+  1: 0.2040
+  2: 13.3800
+cut_speed:
+  round_1: 0.0020
+  round_2: 0.0004
+mip_value:
+  -66729.000000